Troubleshooting
Hummingbird Mint problems — and how to fix them
Hummingbird Mint (Agastache rupestris) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Winter wet rot
The leading killer; soggy soil in winter rots the crown. Plant in very sharp drainage, on a slope or in a raised gritty bed.
Flopping / legginess
Results from shade or rich soil. Grow in full sun and lean ground for self-supporting, compact stems.
Short lifespan
Can be short-lived even in good conditions. Allow some self-seeding, or propagate fresh plants periodically to maintain the planting.
Powdery mildew
Appears in humid or crowded sites. Improve spacing and airflow and avoid overhead watering.
Prevent hummingbird mint problems before they start
Most hummingbird mint issues are care-mismatch, not bad luck. Dial in the basics:
Looking for hummingbird mint in general rather than its problems? Read the full hummingbird mint care guide — light, water, soil and feeding.
Hummingbird Mint problems — FAQ
Why is my hummingbird mint winter wet rot?
The leading killer; soggy soil in winter rots the crown. Plant in very sharp drainage, on a slope or in a raised gritty bed.
Why is my hummingbird mint flopping / legginess?
Results from shade or rich soil. Grow in full sun and lean ground for self-supporting, compact stems.
Why is my hummingbird mint short lifespan?
Can be short-lived even in good conditions. Allow some self-seeding, or propagate fresh plants periodically to maintain the planting.
Why is my hummingbird mint powdery mildew?
Appears in humid or crowded sites. Improve spacing and airflow and avoid overhead watering.